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suhteellinen atomimassa
45803 | 04:50 | 2012-04-17

suhteellinen atomimassa 2
23634 | 02:35 | 2012-04-17

atomimassa
41393 | 02:58 | 2012-04-17

5 ainem r
1483 | 17:13 | 2023-04-17

atomi kertaus
162913 | 10:12 | 2012-04-17

ainem r n laskeminen
84423 | 05:29 | 2012-04-17

atomin rakenne yl koulu
35290 | 03:51 | 2013-04-17

osa 3 suhdekaava
66 | 02:05 | 2023-10-17


ainem r ja moolimassa
49914 | 02:58 | 2012-04-17

how is light created
28725 | 12:44 | 2023-04-17

paulin kieltos nt hundin s nt
47417 | 05:40 | 2012-04-17

bohrin atomimalli
31401 | 03:08 | 2012-04-17